A0 size in pixels
A0 is 841 × 1189 mm. In pixels that is 9933 × 14043 at 300 DPI for print and 2384 × 3370 at 72 DPI.
A0 is one square metre of paper, used for technical drawings and large posters. It measures 841 × 1189 mm, or 33.11 × 46.81 in, with sides in the ratio 1 to √2 so that it halves into the next size down.
| Resolution | Pixels (portrait) | With 3 mm bleed | Megapixels | Uncompressed |
|---|---|---|---|---|
| 72 DPI | 2384 × 3370 | 2401 × 3387 | 8 | 23 MB |
| 96 DPI | 3179 × 4494 | 3201 × 4517 | 14 | 41 MB |
| 100 DPI | 3311 × 4681 | 3335 × 4705 | 15 | 44 MB |
| 150 DPI | 4967 × 7022 | 5002 × 7057 | 35 | 100 MB |
| 200 DPI | 6622 × 9362 | 6669 × 9409 | 62 | 177 MB |
| 240 DPI | 7946 × 11235 | 8003 × 11291 | 89 | 255 MB |
| 300 DPI | 9933 × 14043 | 10004 × 14114 | 139 | 399 MB |
| 400 DPI | 13244 × 18724 | 13339 × 18819 | 248 | 709 MB |
| 600 DPI | 19866 × 28087 | 20008 × 28228 | 558 | 1.56 GB |
| 1200 DPI | 39732 × 56173 | 40016 × 56457 | 2,232 | 6.24 GB |
Landscape is the same numbers the other way round. Pixels are rounded to the nearest whole pixel. The last column is 8-bit RGB before compression.
Which resolution to use for A0
For print that will be held and read, use 300 DPI: 9933 × 14043 pixels, 139 megapixels. A sheet this large is usually seen from further back, so 150 DPI (4967 × 7022 pixels) is often enough and a quarter of the file. For a screen, the DPI number does nothing; only the pixel size matters.
Will a photo fill it?
- A 12 megapixel phone photo (4000 × 3000 pixels), cropped to fill A0, prints at 85 DPI: visibly soft unless seen from across a room.
- A 24 megapixel camera photo (6000 × 4000 pixels), cropped to fill A0, prints at 121 DPI: visibly soft unless seen from across a room.
- A 48 megapixel photo (8000 × 6000 pixels), cropped to fill A0, prints at 171 DPI: fine from a step back, a little soft up close.